NO -
Replace the driver's air mix control motor See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and Repair/Driver's Air
Mix Control Motor Replacement, or repair the driver's air mix control linkage or door.?
7. Disconnect the driver's air mix control motor 7P connector.
8. Disconnect climate control unit connector A (40P).
9. Check for continuity between the following terminals of climate control unit connector A (40P) and the driver's air mix control motor 7P
connector.
Is there continuity?
YES -
Go to step 10.
NO -
Repair an open in the wire(s) between the climate control unit and the driver's air mix control motor.?
10. Check for continuity between body ground and climate control unit connector A (40P) terminals No. 12 and No. 13 individually.
Is there continuity?
YES -
Repair a short to body ground in the wire(s) between the climate control unit and the driver's air mix control motor.?
NO -
Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit See:
Heating and Air Conditioning/Control Assembly/Service and Repair/Climate Control Unit Removal/Installation.?
B1239
DTC Troubleshooting: B1239 (A and MODE)
DTC B1239 or DTC indicator A and MODE:
